10.7 A 25MHz 4-phase SAW hysteretic DC-DC converter with 1-cycle APC achieving 190ns tsettle to 4A load transient and above 80% efficiency in 96.7% of the power range. - Bumkil Lee; Min Kyu Song; Ashis Maity; Dongsheng Brian Ma (ISSCC, 2017)

A 10-MHz 14.3W/mm2 DAB Hysteretic Control Power Converter Achieving 2.5W/247ns Full Load Power Flipping and above 80% Efficiency in 99.9% Power Range for 5G IoTs. - Kang Wei; Bumkil Lee; Dongsheng Brian Ma (VLSI Circuits, 2019)

A 25-MHz Four-Phase SAW Hysteretic Control DC-DC Converter With 1-Cycle Active Phase Count. - Bumkil Lee; Min Kyu Song; Ashis Maity; Dongsheng Brian Ma (IEEE J. Solid State Circuits, 2019)

A 20 MHz On-Chip All-NMOS 3-Level DC-DC Converter With Interception Coupling Dead-Time Control and 3-Switch Bootstrap Gate Driver. - Bumkil Lee; Dongsheng Brian Ma (IEEE Trans. Ind. Electron., 2021)